Hoisting mechanism.



B. F. SHAPER.

HOISTING MECHANISM.

APPLIOATION FILED APB.. 29, 1907.

3 SHEETS-SHEET 1.

B. P. SHAPER.

HUISTING MBCHANISM. APPLICATION FILED APR. 2s, 1907.

3 SHEETS-SHEET 2.

PATBNTED DEC. 17, 1907.

PATENTBD DE01?, 1907.

B. F. SHAPER. HOISTING MBCHANISM.

APPLIOATION FILED APB. 2Q, 1901.

responding UNTTED STATES PATENT oEEroE.

BENJAMIN F. SHAFER, 0F CHESTER, PENNSYLVANIA.

Hors'rING MECHANISM.

Specification of Letters Patent.

I ratenteanec. 17, ,1907.

.Application filed April 29, 1907.* Serial No. 370,886'

This invention relates to portable hoisting.

mechanism, and more particularly to means for setting and removing telephone, telegraph and other poles orsupports, though not limited to this use.

The primary object of the present invention is to provide novel, simple and highly effective mechanism whereby apole or other heavy object maybe raised or lowered with' ease and expedition and with a comparatively small force of men. Y

An embodiment of the invention, that has proven entirely satisfactory for the purpose, is disclosed in the accompanying drawings, wherein Figure 1 is a side elevation showingthe same supfporting a pole.. Fig. 2 is a rearelevation o the mechanism. Fig. 3 is a side elevation of the same, showing the mast or derrick lowered. Fig. 4 is a detail horizontal sectional view of the pivot support for the mast or derrick. Fig. 5 is a sectional view on the line 5-5 of Fig. 4. Fig. 6 isa detail view partly in section showing the mounting of one of the supporting legs. Fig.V 7 is a detail view partly in section of the mast or derrick.

Similar reference numerals designate corparts in all the figures of the drawings.

The hoisting mechanism may be mounted on any well known type of dray or relatively heavy work wagon, and such a vehicle 1s shown in the accompanying drawings, and is designated as a whole by the reference numeral 8. Upon the front portion of the vehicle is mounted a frame consisting of uprights 9 and diagonal braces 10, the latter being connected to the upper ends of the former and to the front end of the vehicle bed. The lower ends of the uprights 9 are secured to the bed of the vehicle by T-shaped braces 8a. Secured to the rear end of the vehicle are hooks 11 that project beyondl y place secured together, as shownvat 14, 1n Fig. 7.

The braces are furthermore connected at intervals by cross bars 15 and tie rods 16, while diagonal crossed braces 17 are located in the spaces between the upper cross bars.

The lowermost cross bar, designated 15,

is, as shown particularly in Figsfi` and 5, provided with reduced rounded portions 18 that A are rotatably mounted in the hooks 11, and 'thus permit the swinging of the mast'or derrick. The swinging movement is secured by means of a block and tackle 19 secured at one end to the upper end of the frame 9-1Q, and having a cable connection 20 with the l v upper end of the mast or derrick. Braces 21- furthermore are hinged as shown at 22 to an intermediate ortion of the mast or derrick, and have their lower ends slidable upon th" bed of the vehicle, said lower ends bei 0 a` ranged to .but a ainst the lower` ends o the uprights 9 of the ame when the mast or derrick is in upright position, as shown Fig. 1: They may, however, be slipped between the.

uprights 9, in which case, they will abut against the tie rod or bar 23. This latter arrangement is employed when'the vehicle sets at an inclination, and in order to secure an upright position of the mast or derrick.

Supporting legs 24 are slidably mounted on the lower ends of the side members 13I of the mast or derrick, the lowermost cross bar 15a having loo s 25 that surround said legs. The legs also aveloo s 26' thatv surround and are slidable upon t e side members 13. The outer sides of these-legs are provided with teeth 27, preferably formed in lates 28. secured lto the opposite sides of the legs, and holding yokes 29, pivoted to the lower ends wardA sliding movement. A- suitable block and tackle 3() is suspended from the u per end of the mast or derrick, and the cab e 31 therefrom may be hitched to av team or connected to any suitable source of power, as forl instance, a motor or eX losive engine that can if desired be mounte directly on the vehicle, all of which will be evident t0- those skilled in the art. .y

In moving the derrick, the mast 12 maybey lowered, as shown in Fig. 3, so that it will pass freely beneath the cross wires or other elevated obstructions. When it is desired vto elevate a pole or other object,y either in settin or removing the same, the vehicle is fide of the pole, or the position in which it so that the mast is directly at one l of the side member, are arranged to interlock -with the teeth to hold the legs against up,-

` lowered into the hole.

is lowered. Experience has to be placed, and said mast is arranged in vertical position. The legs 24 are then extended so that they will rest upon the ground, and thus will transmit the weight from the mast or derrick to the ground, consequently relieving the vehicle or movable sup ortof said weight. The poleis then secure at its center of gavity,'to the block and tackle, and the proper amount of force being applied to the cable 31,'said pole or other object will be elevated. For setting a pole, the hole having rst' been dug, the pple is arranged in vertical position, the butt thereof In removing the pole, it. is drawn out of this position and gradually swung to horizontal osition as it emonstrated that with a comparatively light frame, -a long and heavy pole may be drawn from the hole without the necessity of digging away the earth about the bottom thereof. Furthermore with this structure, oles may be raised., or lowered with ease andp expedition with a comparatively small force of men, and while an engine or motor may be employed, draft animals have been found entirely satisfactory for the urpose, the same draft animals being use in the hoisting mechanism that are emlployed for drawing the vehicle.

*rom the foregoing, it is thought that the construction, operation, and many advan` tages of the herein described 'invention will be apparent vto those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion, and minor details of construction, may be resorted to'without departing from the spirit or sacrificing any of the advantages o the invention.

' `Having thus fully described my invention, what I claim as new, and desire to secure kby Letters Patent, isz- 1. In hoisting mechanism of the character set forth, the combination with a movable support, of a frame carried by the support, a swinging mast or derrick mounted on the support, means connecting the frame and mast or derrick for swinging the latter, and

' a brace connected at one lend to the mast or derrick and .having its other end movable into and out of engagement with said frame on the swinging of the derrick or mast.

2. In hoisting mechanism o f the character set forth, the combination with a wheeled vehicle, of rearwardly pro'ecting hooks arranged on the rear end of t e vehicle, a mast or derrick including side members and a cross bar, said cross bar being journaled in the hooks, and means connecting the upper end of the mast or derrickand the vehicle for swinging said niast or derrick.

3. In hoisting mechanism of the character set forth. the cembination with a support, of

a mast or derrick'having'a cross bar pivotally mounted on the support,- guides secured to thecross bar, leg members adjustably passing through the guides, and'means for securing the legmembers in different positions.

. 4. In hoisting mechanism of the character set forth, the combination with a wheeled vehicle, of a derrick including spaced side- .bars and a cross bar connecting the side bars,'

spaced bearing devices secured to the vehicle and having the cross bar journaled therein, guides located outside the side bars, certain of said guides being secured to the cross bar, legs slidably mounted on the guides outside the side bars, and means for holding the legs in different positions.

5. In hoisting mechanism of the character set` forth, the combination with a wheeled vehicle, of a frame mounted on the front portion of said vehicle, a swinging mast orderrick mounted on the rear end of said vehicle, means connecting the frame and mast or der'rick for swinging the latter, and a brace'f free end movable into and out of engagement with the frame on the swinging of the mast or derrick.

6; In hoisting mechanism of the character set forth, the combination with a support, of spaced hooks projecting from the support, a

having portions journaled in port and connected to the mast or derrick for swinging the same.

7. In hoisting mechanism of the character hingedV to the mast or derriclr and having a ij set forth, the combination with a wheeled vehicle, of a frame mounted on the front portion thereof, rearwardly projecting hooks carried by the rear end of the vehicle, a ymast `or derrick including side members, a cross bar connecting the side members, said :cross bar being journaled in the hooks, connections between the upper end of the frame andthe up er end of the mast or derrick for swinging t e latter, a brace carried by an intermediate portion of the mast or derrick and having its lower end movable into engagement. with the frame, legs slidably mounted on the lower ends of the side members of the mast or derrick,said,.legs being disposed on opposite sides of the vehicle and having teeth, and yokes pivoted on the lower ends of the side members and engaging the teeth to hold the legs against upward sliding movement.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature 1n the presence of two witnesses.

BENJAMIN F. sHA'FnR.'

Witnesses C. GODFREY, II. G. UBIL. 

